Toothed-hub friction pinion



- W. P. BARCLAY.

TYOOTHED HUB FRICTION PINION,

APPLICATION FILED APR. 2a, 1921..

mwmfn Patented Jan. w, 1922.

/N VE N TOR.

. MM 0 0M m g WITNESS? WILLIAM PARIS BARCLAY, OF CHICAGO, ILLINOIS.

TOOTHEID-HUB FRICTION PINION.

Application filed April 28,

To all to 710m it may concern:

Be it known that l, V ILLIAM PARIS BAR- onar, a citizen of the United States, residat Chicago, in the county of Cook and State of Illinois, have invented a new and useful Toothed-l-lub Friction Pinion, of which the following is a specification.

T attention relates to a friction pinion for machinery driving purposes by fries tional contact between the peripherical surf pulley or wheel and the periph- Sl cc of a friction pinion.

the enensiye use of electric machinery l8f()l-.lll high speed and where metal gear wheels are used, there is produced or less noise, and which it would be desirable object to lessen or entirely obviate, and to accomplish the said object 1 have devised frictioh pinion for peripherical h a pulley or wheel to fulfill the ng and rotating conditinos of ordinary )inion metal gears running at a ninus the noise thereof,

g to the dra .vings, in which simirefer to similar parts:

shows an exterior side View of the ction pinion in peripherical conwleii pulley or wheel w.

Specification of Letters Patent.

Patented Jan. 1H0, MR2

1921. Serial no. 465,119.

or wheel to in circumferential contact with the friction pulley, whereby an increase in grip driving contact is attained, as is shown by comparing the amount of grip contact between the said pinion and the pulley or wheel w, as indicated between points in Fig. 1. The grip contact between a noncompressible pinion and a wheel is shown represented in Fig. 4, by two circular segments, as indicated between points (Z.

Closely surrounding the outer circumferenunit, to transmit energy from the friction.

pinion, to the wheel or pulley w, in contact therewith lVhat I claim as new and desire to secure by Letters Patent is- I 1. In a friction pinion the combination 0 a toothed metal hub mounted on a shal icws sectional View of the frichen on line y, z, of Fig. l, a n its driving shaft 8, i shows an exterior peripherical hub, an elastic rubber material vulcanited 1' w said pinion; the said View also circumferentially to the aforesaid hard rub- 1 mowing the friction pinion mounted. on its her material, and one or more courses of a less elastic material such as leather cirhard rubber or vulcanite material circum- QlltlZtllY surrounding the aforesaid metal 5 4, rec ordinary t the amount iction pinion and a pulley when erical contact surfaces each form circle with each other,

hub h of the friction pinion is a number of driving teeth h, 1 closely surrounoing the periphery of the hub is is a flexible material 1 preferably rubber, from the fact that the said material can be attached to the hub it under cliffcrent connitions of hardness and flexibility by vulcanite or heat process, the inner part 9 close to the hub it being harder and less elastic than the larger rubber part 1 surrounding the same, and which is of a more elastic and pliable nature, so as to of grip contact becumferentially surrounding the elastic rubber material, substantially as shown and de scribed.

52. In a friction pinion the combination of a toothed hub attached to a shaft, a rubber vulcanite material mounted upon the hub, circumferentially surrounded by a flexible rubber material encased in a leather band to secure maximum wearing service of the friction pinion during its operation.

8. ln a friction pinion, the combine ion of a toothed hub with a flexible material of varying hardness mounted upon the said hub encased in one or more courses of leather circumferentially surrounding said flexible material for frictional contact with a pulley or wheel, substant ally as shown and described VVlLLlAM PARIS BARCLAY. 

